Kmc x9sl 9 speed super light bike chainready for road or mountain bike mtb use, this x9sl bike chain will optimise the performance of your 9 speed drivetrain'. '.strtoupper('k')mc has added shift enhancing and durability enhancing technologies to ensure you enjoy fast gear changes and smooth operation in all riding conditions.extremely durable 9 speed chainboasting an extremely durable construction which weighs in at only 272g, this is the perfect choice of a replacement or upgrade for keeping your drivetrain running in peak condition'. '.strtoupper('a')dditionally, its coating combats against rust while also delivering high performance so you can enjoy a longer chain life.features speed 9 speed compatibility shimano, campagnolo and sram 9 speed derailleur systems pin length 6.6mm use road, mountain bike mtb size 1 2 x 11 128 links 114 adjustable yes quick link joining link included yes nickel plated extremely durable non directional weight 272gbuy kmc components from chain reaction cycles, the world's largest online bike store.